What uuuup DJO, Plants won't smell "much" till they've been in flower for a couple weeks. Do some readin, get your seeds, pots, 2-3 bags of media, a light, and a box fan, and you're jammin !!! Concentrate on the environment the plants are growin in for now. Unless you're in a sealed environment, Make sure fresh air gets to the plants !! That could be as simple as opening a door, or adding a intake vent.  You can add your exhaust/carbon filter later, when flowering is starting. READ UP BRUH !!!! The more ya know, the better the grow !! I just made that up ! PEACE